Sometimes when I try and type something on my MacBook, it is very laggy, as in a delay between pressing a key and the letter appearing on screen. Doesn’t seem to happen on other forums. Anyone else getting this?

Nah can't say as I am - well not while I'm typing this in - I'm also on a Macbook too - but I'll look into it - thought it might be an ad but then on the reply/post/pm pages there aren't any adverts so can't be that...

Sometimes when I try and type something on my MacBook, it is very laggy, as in a delay between pressing a key and the letter appearing on screen. Doesn’t seem to happen on other forums. Anyone else getting this?

Try Safari/ClearHistory/all history

Sometimes the browser caches and cookies get their knickers in a twist. I've had this issue not on this site but others.

But seriously, Intermittent can be a couple of things, Caches filling up etc, but then we've looked at emptying them by deleting history/data etc.

Something that can affect a Mac's performance is too little RAM, for the number of programmes open, so if one were to have, Photoshop, Illustrator, Word, Excel, Mail and a browser all open at once, with the stock RAM that came with the Mac/Macbook, then using the web might suffer when some of the other processes make demands on the RAM.

Another thing one could do is to run:

Applications/Utilities/Disk utility -select the MacBook 's hard disk at left and run First Aid (not the others) First Aid usually sorts out any minor issues, think of it like tidying up a teenager's bedroom.